There is a square shape with identical sides. In the interior of the square are the letters 'fl.' The F is capitalized and the L is lower case. It looks like a key on a keyboard.

This is a Adobe Flash icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,300 icons, all in the same style and quality.